Properly use preg_match?

How would I change the following preg_match() code to also block the index.html file, stead of only '.' , '..' , or '.htaccess'?

preg_ma开发者_开发问答tch('/^\.(htaccess|\.)?/',$file)

This should do it

preg_match('/^(\.(htaccess|\.)?|index\.html)/',$file)

However, regular expressions are not necessary here

in_array($file, array('.', '..', '.htaccess', 'index.html'))

More readable and easier to extend :)

That would be something like:

preg_match('/^(\.(htaccess|\.)?)|(index\.html)/',$file)

By the way, the parenthesis are just for clarity.

Actually preg_match('/^\.(htaccess|\.)?/',$file) blocks also any other file beginning with a . (because of the ?). So KingCrunch's second solution is not the same and can be risky!

So when you want to match any file starting with a dot (so also including .htaccess and ..) and index.html you could use:

preg_match('/^(\.|index\.html)/',$file)